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There are 13 twelve-letter words containing I, M, O, P, 2R, S and U

APPRESSORIUMappressorium n. (Mycology) A bulbous formation produced by parasitic fungi that is well attached to the cuticle of the…
APPRESSORIUM n. the flattened thickened tip of a hyphal branch by which some parasitic fungi attach to and penetrate their host.
ARCHESPORIUMarchesporium n. (Botany) Any of the cells of the sporangium that give rise to spores.
ARCHESPORIUM n. a primitive cell or group of cells from which a mother cell develops.
ASPERSORIUMSaspersoriums n. Plural of aspersorium.
ASPERSORIUM n. a basin for holy water.
IPRATROPIUMSIPRATROPIUM n. a bronchodilator drug used in the treatment of asthma.
LEPROSARIUMSleprosariums n. Plural of leprosarium.
LEPROSARIUM n. a hospital for lepers.
MICROPTEROUSmicropterous adj. (Entomology) Having small, sometimes merely vestigial, wings.
MICROPTEROUS adj. having small wings or fins.
MICROSPOROUSmicrosporous adj. Relating to microspores.
MICROSPOROUS adj. of or like a microspore, also MICROSPORIC.
PARLOURMAIDSparlourmaids n. Plural of parlourmaid.
PARLOURMAID n. a female servant in a private home who serves at the table, keeps the house clean and answers the door to guests.
PERIMORPHOUSperimorphous adj. Perimorphic.
PERIMORPHOUS adj. like a perimorph, also PERIMORPHIC.
PERIOSTRACUMperiostracum n. (Malacology) The proteinaceous outer sheath of many molluscan shells.
PERIOSTRACUM n. the horny outer layer of a mollusc's shell.
PITYROSPORUMPityrosporum prop.n. Former name of Malassezia (“fungus genus”).
PITYROSPORUM n. a yeastlike fungus which can cause pityriasis.
PROMPTUARIESpromptuaries n. Plural of promptuary.
PROMPTUARY n. a repository; a reference book of facts.
SCRIPTORIUMSscriptoriums n. Plural of scriptorium.
SCRIPTORIUM n. (Latin) a writing room, esp. of scribes in medieval monastery.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the 1Word.ws and WikWik.org.

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See this list for:

  • English Wiktionary: 49 words
  • Scrabble in French: 33 words
  • Scrabble in Spanish: 72 words
  • Scrabble in Italian: 26 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 45 words


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